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    OpenPayerBilling CodesInjuries to the knee and lower legICD-10-CM s84-injury-of-lower-leg-nerves
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    ICD-10-CM Code For Injury Of Nerves At Lower Leg Level: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group S84 includes traumatic and specified injuries to peripheral nerves at the level of the lower leg, covering lesions to the tibial nerve, common peroneal (fibular) nerve, superficial and deep branches, and unspecified lower leg nerves. These ICD-10-CM diagnosis codes are used to document clinical encounters for nerve laceration, compression, stretch, or traumatic disruption at the lower leg, capturing details about anatomic site and laterality where specified. Accurate coding within the ICD-10-CM S84 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM S84: Injury Of Nerves At Lower Leg Level Overview

    This group includes acute and specified injuries to nerves at the level of the lower leg, affecting peripheral nerve function of the tibial, peroneal (fibular), and other named or unspecified nerves. It targets the peripheral nervous system in the lower extremity and includes traumatic and specified nerve lesions that can cause motor, sensory, or mixed deficits. Accurate coding captures the anatomic site and severity of nerve injury, which supports proper claim adjudication and clinical records.

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    When to Use

    Use a code from this group when the clinical documentation indicates a traumatic nerve injury localized to the lower leg, including laceration, crush, stretch, or compression injuries of named or unspecified nerves. Select the code that specifies the exact nerve, laterality, and any associated open wound or encounter type as documented in the medical record.

    ICD-10-CM Codes

    45 rows

    ICD-10-CM CodeDescription
    S84.00XAInjury of tibial nerve at lower leg level, unspecified leg, initial encounter
    S84.00XDInjury of tibial nerve at lower leg level, unspecified leg, subsequent encounter
    S84.00XSInjury of tibial nerve at lower leg level, unspecified leg, sequela
    S84.01XAInjury of tibial nerve at lower leg level, right leg, initial encounter
    S84.01XDInjury of tibial nerve at lower leg level, right leg, subsequent encounter
    S84.01XSInjury of tibial nerve at lower leg level, right leg, sequela
    S84.02XAInjury of tibial nerve at lower leg level, left leg, initial encounter
    S84.02XDInjury of tibial nerve at lower leg level, left leg, subsequent encounter
    S84.02XSInjury of tibial nerve at lower leg level, left leg, sequela
    S84.10XAInjury of peroneal nerve at lower leg level, unspecified leg, initial encounter
    S84.10XDInjury of peroneal nerve at lower leg level, unspecified leg, subsequent encounter
    S84.10XSInjury of peroneal nerve at lower leg level, unspecified leg, sequela
    S84.11XAInjury of peroneal nerve at lower leg level, right leg, initial encounter
    S84.11XDInjury of peroneal nerve at lower leg level, right leg, subsequent encounter
    S84.11XSInjury of peroneal nerve at lower leg level, right leg, sequela
    S84.12XAInjury of peroneal nerve at lower leg level, left leg, initial encounter
    S84.12XDInjury of peroneal nerve at lower leg level, left leg, subsequent encounter
    S84.12XSInjury of peroneal nerve at lower leg level, left leg, sequela
    S84.20XAInjury of cutaneous sensory nerve at lower leg level, unspecified leg, initial encounter
    S84.20XDInjury of cutaneous sensory nerve at lower leg level, unspecified leg, subsequent encounter

    Showing 1–20 of 45

    DRG Codes

    10 rows

    DRG CodeDescription
    073Cranial and Peripheral Nerve Disorders with MCC
    074Cranial and Peripheral Nerve Disorders without MCC
    091Other Disorders of Nervous System with MCC
    092Other Disorders of Nervous System with CC
    093Other Disorders of Nervous System without CC/MCC
    949Aftercare with CC/MCC
    950Aftercare without CC/MCC
    963Other Multiple Significant Trauma with MCC
    964Other Multiple Significant Trauma with CC
    965Other Multiple Significant Trauma without CC/MCC

    Related Codes

    S80-SUPERFICIAL-INJURY-KNEE-LOWER-LEG

    ICD-10-CM Code For Superficial Injury Of Knee And Lower Leg: Group Overview

    S81-OPEN-WOUND-KNEE-LOWER-LEG

    ICD-10-CM Code For Open Wound Of Knee And Lower Leg: Group Overview

    S82-FRACTURE-OF-LOWER-LEG

    ICD-10-CM Code For Fracture Of Lower Leg, Including Ankle: Group Overview

    S83-DISLOCATION-AND-SPRAIN-OF-KNEE

    ICD-10-CM Code For Dislocation And Sprain Of Joints And Ligaments Of Knee: Group Overview

    S85-INJURY-OF-BLOOD-VESSELS-LOWER-LEG

    ICD-10-CM Code For Injury Of Blood Vessels At Lower Leg Level: Group Overview

    S87-CRUSHING-INJURY-LOWER-LEG

    ICD-10-CM Code For Crushing Injury Of Lower Leg: Group Overview

    S88-TRAUMATIC-AMPUTATION-OF-LOWER-LEG

    ICD-10-CM Code For Traumatic Amputation Of Lower Leg: Group Overview

    S89-OTHER-AND-UNSPECIFIED-INJURIES-OF-LOWER-LEG

    ICD-10-CM Code For Other And Unspecified Injuries Of Lower Leg: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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